src/base/time.cc

   1 /*
   2  * Copyright (c) 2003-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Nathan Binkert
  29  */
  30
  31 #include <cstdlib>
  32 #include <ctime>
  33 #include <iostream>
  34 #include <sstream>
  35
  36 #include "base/time.hh"
  37 #include "config/use_posix_clock.hh"
  38 #include "sim/core.hh"
  39 #include "sim/serialize.hh"
  40
  41 using namespace std;
  42
  43 void
  44 Time::_set(bool monotonic)
  45 {
  46 #if USE_POSIX_CLOCK
  47     ::clock_gettime(monotonic ? CLOCK_MONOTONIC : CLOCK_REALTIME, &_time);
  48 #else
  49     timeval tv;
  50     ::gettimeofday(&tv, NULL);
  51     operator=(tv);
  52 #endif
  53 }
  54
  55 void
  56 Time::setTick(Tick ticks)
  57 {
  58     uint64_t nsecs = ticks / SimClock::Int::ns;
  59     set(nsecs / NSEC_PER_SEC, nsecs % NSEC_PER_SEC);
  60 }
  61
  62 Tick
  63 Time::getTick() const
  64 {
  65     return (nsec() + sec() * NSEC_PER_SEC) * SimClock::Int::ns;
  66 }
  67
  68 string
  69 Time::date(const string &format) const
  70 {
  71     time_t sec = this->sec();
  72     char buf[256];
  73
  74     if (format.empty()) {
  75 #ifdef __SUNPRO_CC
  76         ctime_r(&sec, buf, sizeof(buf));
  77 #else
  78         ctime_r(&sec, buf);
  79 #endif
  80         buf[24] = '\0';
  81         return buf;
  82     }
  83
  84     struct tm *tm = localtime(&sec);
  85     strftime(buf, sizeof(buf), format.c_str(), tm);
  86     return buf;
  87 }
  88
  89 string
  90 Time::time() const
  91 {
  92     double time = double(*this);
  93     double secs = fmod(time, 60.0);
  94     double all_mins = floor(time / 60.0);
  95     double mins = fmod(all_mins, 60.0);
  96     double hours = floor(all_mins / 60.0);
  97
  98     stringstream str;
  99
 100     if (hours > 0.0) {
 101         if (hours < 10.0)
 102             str << '0';
 103         str << hours << ':';
 104     }
 105
 106     if (mins > 0.0) {
 107         if (mins < 10.0)
 108             str << '0';
 109         str << mins << ':';
 110     }
 111
 112     if (secs < 10.0 && !str.str().empty())
 113         str << '0';
 114     str << secs;
 115
 116     return str.str();
 117 }
 118
 119 void
 120 Time::serialize(const std::string &base, ostream &os)
 121 {
 122     paramOut(os, base + ".sec", sec());
 123     paramOut(os, base + ".nsec", nsec());
 124 }
 125
 126 void
 127 Time::unserialize(const std::string &base, Checkpoint *cp,
 128                   const string &section)
 129 {
 130     time_t secs;
 131     time_t nsecs;
 132     paramIn(cp, section, base + ".sec", secs);
 133     paramIn(cp, section, base + ".nsec", nsecs);
 134     sec(secs);
 135     nsec(nsecs);
 136 }
 137
 138 void
 139 sleep(const Time &time)
 140 {
 141     timespec ts = time;
 142
 143 #if USE_POSIX_CLOCK
 144     clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
 145 #else
 146     nanosleep(&ts, NULL);
 147 #endif
 148 }
 149
 150 time_t
 151 mkutctime(struct tm *time)
 152 {
 153     time_t ret;
 154     char *tz;
 155
 156     tz = getenv("TZ");
 157     setenv("TZ", "", 1);
 158     tzset();
 159     ret = mktime(time);
 160     if (tz)
 161         setenv("TZ", tz, 1);
 162     else
 163         unsetenv("TZ");
 164     tzset();
 165     return ret;
 166 }
 167